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Commit | Line | Data |
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e69e7fe5 EVH |
1 | /* |
2 | * linux/fs/9p/vfs_dentry.c | |
3 | * | |
4 | * This file contians vfs dentry ops for the 9P2000 protocol. | |
5 | * | |
6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
42e8c509 EVH |
10 | * it under the terms of the GNU General Public License version 2 |
11 | * as published by the Free Software Foundation. | |
e69e7fe5 EVH |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to: | |
20 | * Free Software Foundation | |
21 | * 51 Franklin Street, Fifth Floor | |
22 | * Boston, MA 02111-1301 USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/stat.h> | |
32 | #include <linux/string.h> | |
e69e7fe5 EVH |
33 | #include <linux/inet.h> |
34 | #include <linux/namei.h> | |
35 | #include <linux/idr.h> | |
e8edc6e0 | 36 | #include <linux/sched.h> |
bd238fb4 LI |
37 | #include <net/9p/9p.h> |
38 | #include <net/9p/client.h> | |
e69e7fe5 | 39 | |
e69e7fe5 | 40 | #include "v9fs.h" |
e69e7fe5 | 41 | #include "v9fs_vfs.h" |
e69e7fe5 EVH |
42 | #include "fid.h" |
43 | ||
44 | /** | |
46f6dac2 EVH |
45 | * v9fs_dentry_delete - called when dentry refcount equals 0 |
46 | * @dentry: dentry in question | |
e69e7fe5 | 47 | * |
46f6dac2 EVH |
48 | * By returning 1 here we should remove cacheing of unused |
49 | * dentry components. | |
e69e7fe5 EVH |
50 | * |
51 | */ | |
52 | ||
5174fdab | 53 | static int v9fs_dentry_delete(struct dentry *dentry) |
e69e7fe5 | 54 | { |
7dd0cdc5 WF |
55 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
56 | dentry); | |
e03abc0c | 57 | |
46f6dac2 | 58 | return 1; |
e69e7fe5 EVH |
59 | } |
60 | ||
e03abc0c EVH |
61 | /** |
62 | * v9fs_cached_dentry_delete - called when dentry refcount equals 0 | |
63 | * @dentry: dentry in question | |
64 | * | |
65 | * Only return 1 if our inode is invalid. Only non-synthetic files | |
66 | * (ones without mtime == 0) should be calling this function. | |
67 | * | |
68 | */ | |
69 | ||
70 | static int v9fs_cached_dentry_delete(struct dentry *dentry) | |
71 | { | |
72 | struct inode *inode = dentry->d_inode; | |
7dd0cdc5 WF |
73 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
74 | dentry); | |
e03abc0c EVH |
75 | |
76 | if(!inode) | |
77 | return 1; | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
e69e7fe5 EVH |
82 | /** |
83 | * v9fs_dentry_release - called when dentry is going to be freed | |
84 | * @dentry: dentry that is being release | |
85 | * | |
86 | */ | |
87 | ||
88 | void v9fs_dentry_release(struct dentry *dentry) | |
89 | { | |
bd238fb4 LI |
90 | struct v9fs_dentry *dent; |
91 | struct p9_fid *temp, *current_fid; | |
92 | ||
7dd0cdc5 WF |
93 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
94 | dentry); | |
bd238fb4 LI |
95 | dent = dentry->d_fsdata; |
96 | if (dent) { | |
97 | list_for_each_entry_safe(current_fid, temp, &dent->fidlist, | |
98 | dlist) { | |
99 | p9_client_clunk(current_fid); | |
e69e7fe5 EVH |
100 | } |
101 | ||
bd238fb4 LI |
102 | kfree(dent); |
103 | dentry->d_fsdata = NULL; | |
e69e7fe5 EVH |
104 | } |
105 | } | |
106 | ||
a488257c | 107 | const struct dentry_operations v9fs_cached_dentry_operations = { |
e03abc0c EVH |
108 | .d_delete = v9fs_cached_dentry_delete, |
109 | .d_release = v9fs_dentry_release, | |
110 | }; | |
111 | ||
a488257c | 112 | const struct dentry_operations v9fs_dentry_operations = { |
46f6dac2 | 113 | .d_delete = v9fs_dentry_delete, |
e69e7fe5 EVH |
114 | .d_release = v9fs_dentry_release, |
115 | }; |